Nothing happens with this script, yet if I change my file extension from .php to .html, it works fine and displays all the code where it's supposed to, just as text in stead of running the PHP obviously.

The path is obviously correct, as if finds the file perfectly as an .html, I've tried changing the data type and setting it to "text", but even with that parameter it still doesn't "find" the php file.

I'm obviously missing the boat somewhere, any help would be greatly appreciated.

If your php file doesn't echo anything then it should not return anything, try directly http"://your_domain/signup_UsernameCheck.php in your browser and see what it returns as hakre said.
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The AlphaMar 13 '12 at 12:33

@hakre, I get a "500" inernal server error. If I change the extension to .html, it pulls up fine.
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David MorinMar 13 '12 at 13:44

I've been staring at this for so long that I'm starting to get tunnel vision. @SheikhHeera, thanks for the heads up, I thought of that before posting and commented out all the php except for this line: echo "This is finally working"; as well just in case I have this line outside of the PHP tags: <p>This isn't working</p>. Is this maybe a permissions issue or something?
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David MorinMar 13 '12 at 14:01

I was kind of thinking that myself, any idea where it would be? PHP works fine on the server, the entire rest of the site runs off of it.
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David MorinMar 13 '12 at 13:58

There can be numerous reasons why you get a 500. If you want to troubleshoot it yourself, start with the error log of your server.
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hakreMar 13 '12 at 14:02

I checked it out and it ended up beign a permissions thing, due to the way the site runs off of "index.php?public="xxxx", looks like a .php page accessed directly gives a permissions error. I don't have enough knowledge to know why yet, but at least I'm getting the data now, thanks for the assistance.
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David MorinMar 13 '12 at 14:41

I've already accepted this answer but just an update to what was happening in case anyone else has this issue: It did end up being a permissions issue, I had to set that specific to 644 and it fixed it!
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David MorinApr 9 '12 at 16:55

@DavidMorin: Thanks for the follow-up. 0644 is rw-r--r--. Do you know which permissions were set when you had the error?
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hakreApr 10 '12 at 8:44

Thanks, it didn't appear to make a difference. I've tried accessing the file directly on the server as others suggested and I get 500 error so, looks like I need to resolve that first. I appreciate the time
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David MorinMar 13 '12 at 14:03